/*
 * Package il.ac.biu.cs.grossmm.impl.activeData
 * File SqlRootNode.java
 * 
 * This is a part of presence service framework prototype. 
 * See javadoc for more information.
 *  
 * Copyright (C) 2006 Grossmann Mark
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package il.ac.biu.cs.grossmm.impl.activeData;

import il.ac.biu.cs.grossmm.api.data.UpdateType;
import il.ac.biu.cs.grossmm.api.flow.NodeInspector;
import il.ac.biu.cs.grossmm.api.keys.Key;

public class SqlRootNode<N> extends SqlNodeBase<N> implements Root<N> {

	/**
	 * Subscription associated with the data tree rooted at this node, null if
	 * no subscription associated.
	 */
	transient SubscriptionImpl<N> subscription;

	static SqlInspector inspector = new SqlInspector();

	SqlSynch synch;

	public SqlRootNode(SqlRootMapping mapping, int id) {
		super(mapping, id);

		synch = new SqlSynch();
	}

	public SqlSynch getSynch() {
		return synch;
	}

	/**
	 * @return the subscription
	 */
	public SubscriptionImpl<N> getSubscription() {
		return subscription;
	}

	/**
	 * @param subscription
	 *            the subscription to set
	 */
	public void setSubscription(SubscriptionImpl<N> subscription) {
		this.subscription = subscription;
	}

	@SuppressWarnings("unchecked")
	@Override
	public <P> SqlNodeBase<P> getParent() {
		return null;
	}

	@Override
	public SqlRootNode getRoot() {
		return this;
	}

	public Key getKey() {
		// TODO Implement getKey
		// return null;
		throw new RuntimeException("Not implemented");
	}

	public NodeInspector readLock() {
		try {
			synch.readLock();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
		return inspector;
	}

	public void readUnlock() {
		synch.readUnlock();
	}

	public UpdateType getUpdateType(int i) {
		throw new UnsupportedOperationException();
	}

}
